Twist for .257

[nhenry]

Hello all,
I can't find any info on this so I'm hoping y'all can help. I ordered a new barrel for my Tikka in 25-06 rem in a 1:7.5 twist with the intent to shoot the longer bullets that are coming out. I know that it can also be used for the 115-120s I already use. However, I'm unsure if I'd be able to shoot the 100 gr bullets. Anyone able to give me info on this? Thanks

 

[Jud96]

Most likely the 100s will work, but you may overspin them considering a 7.5 twist with 3300fps is 316,000 RPM. The general consensus is to keep RPMs under 300,000 for cup and core bullets. Like I said, it will probably be fine but I would just be aware of that.

 

[Rem81]

102 grain hammer hunter shoots .3 group out of my 25-06ai 8 twist at 3450 fps! Tired 85 nosler ballistic tips and 87 Speer tnt with .5 group!!! The 85 grain nosler ballistic tip would have a flier every once in a while, had it at 3620 fps! The 87 Speer shot pertty consist .5 group at 3560fps. Shot a coyote with 102 hammer hunter tonight and drt!!!

 

[AZShooter]

Interesting topic. With an 85 gr nosler varmint ballistic tip Nosler's load data page says you can get 3825 fps from a 257 weatherby. With a 1 in 7.5 twist that would yield 367,200 RPMs. Nosler says: "Nosler® Ballistic Tip® Varmint bullets thrive on ultra-high velocity loads". Would love to hear what happens if you choose to try them.

To date I have not had a single 55 Nosler BT varmint bullet come apart from a 6mm-284 @ 4200 fps 326,918 RPM.

Who knows maybe 367,200 RPM would be too much.

I can guarantee if you choose a mono or a bonded bullet you won't have to worry.

 

[nhenry]

Interesting topic. With an 85 gr nosler varmint ballistic tip Nosler's load data page says you can get 3825 fps from a 257 weatherby. With a 1 in 7.5 twist that would yield 367,200 RPMs. Nosler says: "Nosler® Ballistic Tip® Varmint bullets thrive on ultra-high velocity loads". Would love to hear what happens if you choose to try them.

To date I have not had a single 55 Nosler BT varmint bullet come apart from a 6mm-284 @ 4200 fps 326,918 RPM.

Who knows maybe 367,200 RPM would be too much.

I can guarantee if you choose a mono or a bonded bullet you won't have to worry.

I never go under 100, but I use some Speer SPBT 100s and Nosler Ballistic Tips. Very lethal and I wouldn't want to give up the range of bullets

 

[Aoudad shooter1975]

When one of my 257's give up and toast the barrel will get a 1-8...until then--my 1-10s will keep spinning 110-115s

 

[nhenry]

When one of my 257's give up and toast the barrel will get a 1-8...until then--my 1-10s will keep spinning 110-115s

I had a very lucky break. I got the tikka in 270 with the barrel shot out for very very cheap, so now I get to rebarrel er

 

[matt_3479]

I went 1:7 twist on my 25 creed for the sole purpose of heavies. 131 blackjacks shoot awesome in jt

 

[imyourhuckleberry]

My experience has shown that it is a hit and miss especially with hunting rounds designed to expand . Depending on the brand of manufacturers the jacketing on the bullet may come apart from such a fast spin. Bullet design and manufacturer could be your limiting factor.

 

[ButterBean]

Hello all,
I can't find any info on this so I'm hoping y'all can help. I ordered a new barrel for my Tikka in 25-06 rem in a 1:7.5 twist with the intent to shoot the longer bullets that are coming out. I know that it can also be used for the 115-120s I already use. However, I'm unsure if I'd be able to shoot the 100 gr bullets. Anyone able to give me info on this? Thanks

You'll be fine with the 25-06, just load what you want and let it eat

 

[BEEMAN]

1-7.25" on my 25-284. Shoots the 131 BJ excellent.

 

[Hoss50]

When I asked Blackjack about a 1:7 twist for a 257 weatherby they said to keep it at 1:7.5 or 8 otherwise I would need to keep the velocity below 3250 to keep them from coming apart.

 

[Aoudad shooter1975]

Hosss50 I have a friend that has shot hammers and a few blackjacks when he can get them..he has a 1-8 and it shoots good....with a speedy 257--I'd go 1-8

 

[sierracharlie338]

I shoot 110 accubonds out of a 7 twist 257AI with zero issues.